tpcalib.c revision 1.7 
1/*	$NetBSD: tpcalib.c,v 1.7 2006/10/09 10:33:42 peter Exp $	*/
2
3/*
4 * Copyright (c) 1999-2003 TAKEMURA Shin All rights reserved.
5 * Copyright (c) 1999 PocketBSD Project. All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 *
28 */
29
30#include <sys/cdefs.h>
31__KERNEL_RCSID(0, "$NetBSD: tpcalib.c,v 1.7 2006/10/09 10:33:42 peter Exp $");
32
33#ifdef _KERNEL_OPT
34#include "opt_tpcalib.h"
35#endif
36
37#include <sys/param.h>
38#include <sys/systm.h>
39#include <sys/device.h>
40#include <sys/kernel.h>
41#include <dev/wscons/wsconsio.h>
42#include <dev/wscons/tpcalibvar.h>
43
44#ifdef TPCALIBDEBUG
45int	tpcalib_debug = 0;
46#define	DPRINTF(arg) if (tpcalib_debug) printf arg;
47#else
48#define	DPRINTF(arg)
49#endif
50
51/* mra is defined in mra.c */
52extern int mra_Y_AX1_BX2_C(const int *, int,
53			   const int *, int, const int *, int, int, int,
54			   int *, int *, int *);
55
56#define SCALE	(1024*256)
57
58int
59tpcalib_init(struct tpcalib_softc *sc)
60{
61	tpcalib_reset(sc);
62	return (0);
63}
64
65void
66tpcalib_reset(struct tpcalib_softc *sc)
67{
68	/* This indicate 'raw mode'. No translation will be done. */
69	sc->sc_saved.samplelen = WSMOUSE_CALIBCOORDS_RESET;
70}
71
72void
73tpcalib_trans(struct tpcalib_softc *sc, int rawx, int rawy, int *x, int *y)
74{
75	if (sc->sc_saved.samplelen == WSMOUSE_CALIBCOORDS_RESET) {
76		/* This indicate 'raw mode'. No translation will be done. */
77		*x = rawx;
78		*y = rawy;
79	} else {
80		*x = (sc->sc_ax * rawx + sc->sc_bx * rawy) / SCALE + sc->sc_cx;
81		*y = (sc->sc_ay * rawx + sc->sc_by * rawy) / SCALE + sc->sc_cy;
82		if (*x < sc->sc_minx) *x = sc->sc_minx;
83		if (*y < sc->sc_miny) *y = sc->sc_miny;
84		if (sc->sc_maxx < *x)
85			*x = sc->sc_maxx;
86		if (sc->sc_maxy < *y)
87			*y = sc->sc_maxy;
88	}
89}
90
91int
92tpcalib_ioctl(struct tpcalib_softc *sc, u_long cmd, caddr_t data, int flag,
93    struct lwp *l)
94{
95	const struct wsmouse_calibcoords *d;
96	int s;
97
98	switch (cmd) {
99	case WSMOUSEIO_SCALIBCOORDS:
100		s = sizeof(struct wsmouse_calibcoord);
101		d = (const struct wsmouse_calibcoords *)data;
102		if (d->samplelen == WSMOUSE_CALIBCOORDS_RESET) {
103			tpcalib_reset(sc);
104		} else
105			if (mra_Y_AX1_BX2_C(&d->samples[0].x, s,
106				    &d->samples[0].rawx, s,
107				    &d->samples[0].rawy, s,
108				    d->samplelen, SCALE,
109				    &sc->sc_ax, &sc->sc_bx, &sc->sc_cx) ||
110			    mra_Y_AX1_BX2_C(&d->samples[0].y, s,
111				    &d->samples[0].rawx, s,
112				    &d->samples[0].rawy, s,
113				    d->samplelen, SCALE,
114				    &sc->sc_ay, &sc->sc_by, &sc->sc_cy)) {
115				printf("tpcalib: MRA error");
116				tpcalib_reset(sc);
117
118				return (EINVAL);
119			} else {
120				sc->sc_minx = d->minx;
121				sc->sc_maxx = d->maxx;
122				sc->sc_miny = d->miny;
123				sc->sc_maxy = d->maxy;
124				sc->sc_saved = *d;
125				DPRINTF(("tpcalib: x=%d~%d y=%d~%d\n",
126				    sc->sc_minx, sc->sc_maxx,
127				    sc->sc_miny, sc->sc_maxy));
128				DPRINTF(("tpcalib: Ax=%d Bx=%d Cx=%d\n",
129				    sc->sc_ax, sc->sc_bx, sc->sc_cx));
130				DPRINTF(("tpcalib: Ay=%d By=%d Cy=%d\n",
131				    sc->sc_ay, sc->sc_by, sc->sc_cy));
132			}
133		break;
134
135	case WSMOUSEIO_GCALIBCOORDS:
136		*(struct wsmouse_calibcoords *)data = sc->sc_saved;
137		break;
138
139	default:
140		return (EPASSTHROUGH);
141	}
142	return (0);
143}
144